Never have I ever tried this. Never have I yet been happy with a cart mod, we have just been sticking to poly or fluval, tried PTB...straws. This....THIS MOD is the end all. I even ordered a 50 pack of the springs and will offer up probably 40 of them in the classifieds (cost + a stamp). Just wow. I don't understand how I can have a CART FULL OF NIQUID and it is not leaking, it is, as someone says in that thread, 'Dripping 2.0'...